Citrix License usage issue

This may be a complex answer but hopefully you can follow along.

Make sure logging is enabled on your license server:

Enabling Report Logging
Updated: 2009-08-10

The report log contains data about licensing activity that can help you understand the rate of license consumption in your environment and plan for future purchases. Before you can generate any historical reports, you must enable the report logging feature. Report logging is inactive by default because report logs can grow excessively large. You can tell if report logging is inactive because the words Not Configured appear adjacent to "Report Log" on the File Locations page (Configure License Server > File Locations). If a path name appears, reports are enabled.

In the License Management Console, return to the License Management Console Welcome screen by clicking the License Management Console logo located in the top left corner on any page.
Click Configure License Server > File Locations > Change.
Enter the path where you want to create your report log and specify a meaningful name for the report log (for example, C:\Program Files\Citrix\Licensing\LS\July05.rl). The name must have an .rl extension. Do not enclose paths in quotation marks when entering them in the License Management Console.
Click Change.
The report log is enabled and the path where it is stored appears adjacent to Report Log.

You will have to wait a day or so to generate activity in the log file.

Generating a List of Users Using Your Licensing System
Updated: 2009-08-10

In the License Management Console, return to the License Management Console Welcome screen by clicking the License Management Console logo located in the top left corner on any page.
Click Generate Historical Reports > Historical Usage.
On the Report Logs page, click Add.
From the Available Report Logs list, choose one or more report logs you want to use as the basis for your report, then click Add. The report log that you chose appears on the Report Logs page.
Click User Reports, choose the product license and the dates, then click Proceed with Selected Product and Date Range.
On the Generate User Reports page, click Generate Unique Named User List for Selected Product and Date Range.
On the User List Report page, click View CSV Output File.
Depending on your operating system or browser, save or open (and save) the file.
Tip: You can import the .csv file into another application to manage the comma separated values (for example, Excel).

Generating a User Report
Updated: 2009-08-10

In the License Management Console, return to the License Management Console Welcome screen by clicking the License Management Console logo located in the top left corner on any page.
Click Generate Historical Reports > Historical Usage.
On the Report Logs page, click Add.
From the Available Report Logs list, choose one or more report logs you want to use as the basis for your report, then click Add. The report log that you chose appears on the Report Logs page.
Click User Reports, choose the product license and the dates, then click Proceed with Selected Product and Date Range.
On the Generate User Reports page, click Generate Unique Named User List for Selected Product and Date Range.
On the User List Report page, click Close to close the user list and return to the Generate User Reports page.
Click Edit List, choose the users you want in the report, then click Submit.
Note: Citrix recommends that you limit reports to 40 users or fewer. Reports with more than 40 users can be difficult to read.
Choose the summary period for the data you want to review; for example, month, minute, hour, or day.
Choose the type of data you want for the report:
Peak Count is the maximum number of licenses checked out during a specified time period, sorted by user name
License Usage Time is the amount of time a license is in use, sorted by user name
Click Generate Report.
The report appears in a new window.

All this is taken from the edocs version of the license documentation at http://support.citrix.com/proddocs/index.jsp